So there must technically be a finite amount of good songs that there can be, right? I mean, even the sounds between the notes, there is a finite amount of. The same goes for words.

So, I guess my question is: can anyone work out:

a) The number of possible songs in this universe of sensory perception of ours
b) The percentage of existing songs which is good, thus giving us a general idea of how much music might be worth listening to

Or wait, does the whole concept of length just scupper it? (or at least make it ridiculously complicated)